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  1. Karaf
  2. KARAF-6480

Permgen JVM options still being used on Windows

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 4.2.7
    • Fix Version/s: 4.3.0, 4.2.8
    • Component/s: karaf
    • Labels:
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      Description

      The -XX:PermSize and -XX:MaxPermSize options are still being set in karaf.bat, but they are deprecated in Java 8+ and ignored in Java 11+.

      The equivalent parameters were handled for Linux in KARAF-3945.

      These JVM parameters are deprecated starting in Java 8 but are "still accepted and acted upon" through Java 10:

      https://docs.oracle.com/javase/8/docs/technotes/tools/windows/java.html

      https://docs.oracle.com/javase/10/tools/java.htm

      Starting in Java 11, these options are "accepted but ignored":

      https://docs.oracle.com/en/java/javase/11/tools/java.html

      And they are still accepted through the latest: Java 13.

      These options would ideally (for me) be replaced with the equivalent Metaspace parameters -XX:MetaspaceSize and -XX:MaxMetaspaceSize. More info:

      https://blogs.oracle.com/poonam/about-g1-garbage-collector,-permanent-generation-and-metaspace

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            • Assignee:
              jbonofre Jean-Baptiste Onofré
              Reporter:
              rsands Richard Sands
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              Dates

              • Created:
                Updated: